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Mathematics, 12.07.2019 22:00, eila3601
Identify the error or errors in this argument that supposedly shows that if ∃xp (x) ∧ ∃xq(x) is true then ∃x(p (x) ∧ q(x)) is true. 1. ∃xp (x) ∨ ∃xq(x) premise 2. ∃xp (x) simplification from (1) 3. p (c) existential instantiation from (2) 4. ∃xq(x) simplification from (1) 5. q(c) existential instantiation from (4) 6. p (c) ∧ q(c) conjunction from (3) and (5) 7. ∃x(p (x) ∧ q(x)) existential generalization
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Identify the error or errors in this argument that supposedly shows that if ∃xp (x) ∧ ∃xq(x) is true...
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